use actix_web::{HttpResponse, web};
use serde::Deserialize;
use utoipa::IntoParams;

use crate::api::response::{ApiErrorResponse, ApiResponse};
use crate::error::AppError;
use crate::models::issues::IssueLabel;
use crate::service::AppService;
use crate::service::issues::labels::UpdateLabelParams;
use crate::session::Session;

#[derive(Debug, Deserialize, IntoParams)]
pub struct PathParams {
    pub workspace_name: String,
    pub repo_name: String,
    pub label_id: uuid::Uuid,
}

/// Update a label
///
/// Updates an existing issue label's name, color, or description.
/// Requires Admin role in the repository.
///
/// All fields are optional; only provided fields are updated.
/// Returns the updated label.
#[utoipa::path(
    put,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/issues/labels/{label_id}",
    tag = "Issues",
    operation_id = "issueUpdateLabel",
    params(PathParams),
    request_body(content = UpdateLabelParams, description = "Label update parameters (all fields optional)", content_type = "application/json"),
    responses(
        (status = 200, description = "Label updated successfully.", body = ApiResponse<IssueLabel>),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 403, description = "Insufficient permissions (requires Admin role)", body = ApiErrorResponse),
        (status = 404, description = "Repository, workspace, or label not found", body = ApiErrorResponse),
        (status = 500, description = "Internal server error", body = ApiErrorResponse),
    ),
    security(("session_cookie" = []))
)]
pub async fn update_label(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    params: web::Json<UpdateLabelParams>,
) -> Result<HttpResponse, AppError> {
    let label = service
        .issue
        .issue_update_label(
            &session,
            &path.workspace_name,
            &path.repo_name,
            path.label_id,
            params.into_inner(),
        )
        .await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new(label)))
}